Work-drive for grinding machines.



C. H. NORTON 61 J. S. WILCOX, III.

WORK DRIVE FOR GRINDING MACHINES.

APPLICATION FILED OCT. 24. l9l6.

1 ,271 ,208. Patented July 2, 1918.

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C. H. NORTON 61 J. S. WILCOX,JR.

WORK DRIVE FOR GRINDING MACHINES.

APPLICATION FILED OCT.24.19!6.

1 ,27 1 ,208. Patented July 2, 1918.

IIIIIIIIII C. H.NORTON (Si 1. S. WlLCOX,Jn.

WORK DRIVE FUR snmomc MACHINES.

APPLICATlDN FILED OCT. 24. Wlb

Patented J uly 9, 1918.

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C. H. NORTON dz J. S. W|LCOX,JR.

WORK DRIVE FOR GRINDING MACHINES,

APPLICATION FILED 0CT2'4, l9l6 I ,27 1,208, Patented July 2,1918.

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flmzaar. mill We've wmess J8 UNITED STATES PATENT OFFICE.

CHARLES H. NORTON AND JOSEPH S. WILCOX, JIL, OF WORCESTER, MASSACHUSETTS, ASSIGNORS TO NORTON GRINDING COMPANY, OF WORCESTER. MASSACHUSETTS. A

CORPORATION OF MASSACHUSETTS.

l WORK-DRIVE FOR GRINDING-MACHINES.

Application filed October 24, 1916.

To all warm it may concern:

lie it known that we, (jnannns ll. Non'rox and .,-'lo-rt1l'lf S. VILUUX, J12. citizens of the United States. residing at Worcester, in the county of Worcester and State of lllassachnsetts, have invented a new and useful \Vork- Drive for Grinding-lllachines. of which the following." isa specification.

This invention relates to a work drive for grinding machines of the type in which the work is continuously rotated l'or the production oi rn'limlrieal or conical parts,- and it is the obi-get of our invention to provide an improved work drive for machines of this type.

With this object in view a principal f6tltur of our invention consists in the provision of means for transmitting an extremely smooth and even relative motion from a member rotatable in fixed hearings to -.1 member rotatable in a work head'which is mounted on a table for reciprocation on the machine, and which may be adjusted longitir dinally to any desired position on the table. The axis of rotation may be fixed parallel to the ways of the table or it may be angle larly adjustable within defined limits. As herein described the work is supported upon fixed or dead centers, and is rotated thereon by engagement with the rotatable member. The particular manner of supporting the. work is not material, however, and our invention is equally adapted for use when the work is mounted upon a rotatable support with which the rotatable member is connected.

. More specifically, our invention relates to the provision of positive geared connections between a drive shaft mounted in the base of a machine and a rotatable Work-driving member mounted upon a reciprocating work table. These geared connections in the preferret] form include transmitting shafts lllOltiiiinl in bearings movable about horizontal a in said base and said work head respee ly. and telescoping driving coilneetions between said shafts.

A further feature ofour invention relates to the provision of means for maintaining the said transmission shafts in a straight line when the work table is wciprocating and the axis of rotation of the work is parallel to the Specification of Letters Patent.

Patented July 2, 1918.

Serial No. 127.394.

ways of the table, and for maintaining the operating relation of said transmission shafts when the swivel table is angularly adjusted for grinding conical work. Said means, in the preferred form, comprises a rod hinged to the bearing of one shaft and slidable in a sleeve hinged to the bearing of the other shaft. 1

Additional features of our invention relate to details ol construction and arrangements and combinations of partsivhich Will he hereinafter described and more particularly set forth in the upended laims.

lh'el'erred forms ofour invention are shown in the drawings, in which Figure 1 is an end elevation of a portion of a grinding machine with our improved work drive in its complete form embodied therein;

Fig. 3 is a rear elevation of the parts shown in Fig. 1;

Fig: 3 is an enlarged elevation partly in section of the rmnwrtions from the drive shal't to the lower end of the telescoping shaft;

l ig. 4 is a horizontal sectional view taken along: the line 4-4 in Fig. 3;

Fig. 5 is a vertical sectional view taken along the line 5--5 in Fig. 3;

Fig. (5 is a vertical sectional view take along the line 6 6 in Fig. 2;

Fig. 7 is a partial horizontal sectional view taken along the line 7-7 in Fig. 6;

Fig. 8 is a vertical sectional view taken along the line 88 in Fig. 7, and

Fig. 9 is a rear elevation similar to Fig. 2', but showing a modified construction.

Referring to Figs. 1 and 2 We have shown portions of a grinding machine of a common type including a base 10, a work table 11 slidable longitudinally on ways 12 and 13, and a swivel table 14 mounted on the work table 11 and capable of limited angular adjustment relatively thereto. A clamp 15 (Fig. 2) is provided for securing the swivel table '14: upon the work table 11, and indcxes. not shown, are commonly )rovided to indicate the angular relation 0. the parts. The adjustment of the table 14 upon the table 11 is commonly limited to about ten degrees each side of the zero position.

A work head 16 is mounted upon the swivel table 14 and may be longitudinally adjusted along ways 17 and 18. A bolt 19 provides means for clamping the head to the table in the desired position. A sleeve 20 (Fig. 6) is mounted in the head 16 and a dead center 20' in the sleeve 20 supports one end of the work for engagement by the wheel W. The )arts thus far described may be of the usual type and form no part of our invention.

A drive shaft 21 (Fig. 4) is mounted in the lower portion of the base 10 and is connected witha source of power in any convenient manner, as by bevel gears 22 and 23. The shaft 21 is herein shown as supported near one end by a ball bearing 24 mounted in a bushing 25 fitted into the side of the base 10.

A sleeve or shell 26 (Fi 5) is pivoted to swing about the axis of t e shaft 21, bein supported thereon by ball bearings 27 an 28 (Fig. 4). A transmitting shaft 30 (Fig. 52 is mounted in bearings 31 and 32 in the s eeve 26 and is driven from the. shaft 21 by spiral gears 33 and 34 keyed to the shafts 21 and 30 respectively. The shaft 30 is thus positively driven through geared connections from the shaft 21 and is anlgularly adjustable about the axis of said s aft.

A work-driving rotary member, herein shown as a worm wheel 40, is mounted in the work head concentric with the sleeve 20 and is driven by a worm 41 keyed to a horizontal intermediate shaft 42 mounted above the sleeve 20 and supported by bearings 43 and 44 in the head 16. A sleeve or shell 45, (Fig. 8) similar in construction to the sleeve 26 previously described, is pivoted to swing about the axis of the shaft 42 and is supported thereon by bearings 46 and 47 (Fig. 6). A transmitting shaft 48 (Fig. 8) 15 carried in bearings 49 and 50 in the sleeve 45 and is connected to drive the shaft 42 through a worm 51 and a worm wheel 52 keyed respectively to the shafts 48 and 42.

Universal driving connections are provided between the transmittin shaft 30 mounted on the base of the machmeand the transmitting shaft 48 mounted on the spindle head. These connections com rise a grooved rod 60 (Fig. 6) connects by a universal joint 61 to thelower end of the shaft 48 and a sleeve 62 (Fig. 5)'connected by a. universal joint 63 to the shaft 30. The sleeve 62 is provided with keys 64 slidable in the grooves of the rod 60 and preventin relative an ular movement of the rod and sleeve. A oose sleeve 65 is secured to the rod 60 and extends down over the member 62, thus protecting the movable parts from dust and dirt.

We have thus provided complete geared drivin connections from the driving shaft 21 to t e rotatable member 40, but some ad ditional provision is necessary to always maintain the transmitting shafts 30 and 48 in operative relation to each other.

For this pur ose we provide a rod 66 having a head 6 mounted on a stud 68,extending transversel throughia projection 69 formed on the sleeve 45. The rod 66 is thus mounted to swing in one direction relatively to the sleeve 45 and shaft 48, but must always swing in a plane parallel to said shaft.

At its lower end the shaft 66 is slidable in a sleeve 70 pivoted at 71 on a projection 72 formed on the sleeve 26. The sleeve 70 and rod 66 are thus mounted to swing in one direction relatively to the shaft 30 but niust always move in a plane parallel to said shaft. The rod 66, connected as above described to both of the sleeves 26 and 45 maintains the shafts 30 and 48 in operative relation in every position of the work head 16.

If the swivel adjustment of the table 14 upon the table 11 is omitted the driving connection may be somewhat simplified as.

shown in Fig. 9. In this case the universal joints 61 and 63 may be omitted and the rod 66 and its connections will then become unnecessary. lVhenever the swivel table is used, however, and whenever the shafts 30 and 48 are out of alinement in the plane of Fig. 1, the universal joints and the rod 66 become necessary to maintain the shafts in operative relation.

The driving connections (not shown) from the rotary member 40 to the work may be of any usual construction and form no part of our invention. The method of B11 porting the work is likewise immaterial, t e dead center herein shown bein illustrative merely. Live centers or a c uck or any other suitable supporting device may be substituted. It will also be evident that other changes and modifications can be made by those skilled in the art without departing from the spirit and scope of our invention as set forth In the claims. Therefore we do not wish to be otherwise limited to the de-' tails herein disclosed, but what we claim 1s:-

1. A work drive for a inding machine havin in combination, a ase,'a table slidable t ereon, a rotatable work support on said tableya cross shaft extendin transversely' of said table and connected 0 rotate said support, a driving shaft extending transversely of said base and mounted in fixed bearings therein, said shafts being positioned in parallel horizontal planes, transmission shafts mounted in bearings movable about the axes of said first mentioned shafts, and positive driving connections between the several shafts.

2. A work drive for a rinding machine havin in combination, a ass, a table slidable t ereon, a rotatable work support on mtlll ta le. eross shalt extending transvei'st'l) of said table and connected to rotate said support. a driving slial't' extending transversely of said base and mounted in lived bearing therein, said shafts being posilioned in parallel horizontal planes, transmission hatt mounted in bearings movable about the axes of said first mentioned shafts, and positive driving eonneetions between the several shafts ineludiug ronnteting elements etween said transmission shafts \vhieh permit rhanges to be made in the dis-- lain-e between said shafts without interruptin; their driving function.

3. A \vorh-drive tor a grinding machine, having in eombination a work support, a I'IOss hat't eonneetod to rotate the work llnnllltrii thereon. a driving shaft, said shafts being positioned in parallel horizontal plane-i. ltfltltHtllssiOl) shafts mounted in bearings movable about the axes of said first mentioned shafts, positive driving eonnertions between the several shafts int-hiding universal CUHllOt'ldOUs between the last lnentioued shafts. and means to eontinnoualv maintain said ilmt'ts in operative relation.

l. A orh drive for a grinding machine, inning. in combination. a work support, a eross shaft connected to rotate the work mounted thereon, a drive shaft, said shafts being positioned in parallel planes, transmission shafts mounted in bearings movable about the axes of said first mentioned shafts. positive driving connections between the several shafts including universal eonneetioin between the last mentioned shafts, and means to maintain said shafts in operative, relation. said means romprising a sleeve pivoted to n halving, and a rod pivoted to the other bearing and sliding in said sleeve.

in a grinding machine, a base, a drive shalt supported in bearings fixed reiatively to said base, a table slida le longitudinally relatively to said base, a work-head mounted on said sliding il'll ll, a work-drhing member rotatably mounted in said head, and a positive geared driving eonneetion from said shaft to said member. 3. in a grinding maii'hine. a base, a sliding mm. a \Yfll'l'i-ltl'itl adjustable on said table. ,1 iv :rledriving member rotatable in said head. a transmitting shaft supported in a binningangularlv movable on said head and minim-ted lo drivisaid member, a transiiiiitimg shaft upported in a bearing, angle iarlv djustable on said base, a driving eollnwtion lie-tween said two transmitting shal'l and means to keen said shal'ts in o iratlie ielation in ever position the sv-indln head 1 in a grinding maehine having a workiuiidi a \\Hil{-(ll'l\"t: ooinprining a shaft mount d in a bearing movable about a tixed how-main! axi a ,--,erond shah i-ioin ted in a" bearing movable about a horizontal axis in said work head, and telo roping driving connections between said shafts.

S. In a grinding machine having a workhead, a work-drive romprising a shaft mounted in a bearing movable about a fixed horizontal axis, a second shaft mounted in a bearing movable about a horizontal axis in said 'ol'kdtetltl, and telescoping universal driving connections between said shafts.

In a grinding machine, a base, a table slidable thereon, a worlidnead adjustable on said table, a workalriving rotary member mounted in said head a horizontal inter-- mediate shaft mounted transversely in said head, a transmitting shaft mounted in a bearing movable about the axis of said intel-mediate shaft, gearing connecting said shaft and rotary member, and means to drive said transmitting shaft.

10. In a grinding machine, a base, a drive shaft supported in hearings fixed relatively to said base, a table slidablo relatively to said base, a workdlead mounted on said sliding table, a work driving member rotatable in said head, and means to drive said member positively from said drive shaft, saidv means ineluding a sleeve pivoted about the axis: of Haiti drive shaft, a transmitting shaft; rotatable in said sleeve transversely of said drive shaft. driving CUliIlUUl'lUllS between said shafts, a second sleeve pivoted about a horizontal axis in the work head, a second transmitting shaft rotatable in said second sleeve, telescoping drivin tOlIllPt'llUllS be.- W001i said transmit-ting sliafts, and driving ronneetions from said aerond transn'iit'ting shaft to said rotar member.

11. in a grinding r rhine, a base, a drive ahal't supported in bearings fixed relatively to said base, a table slidable relatively to said base, a \vorkdn-ad mounted on said sliding table and adjustable thereon, a vvork driving member rotatable in said head, and means to drive said rotary member positively fr m said drive, shaft, said means; in eluding a sleeve pivoted about the axis of said drive shaft, :1 transmitting shaft rotatable in said sleeve transversely of said drive shaft. driving eonneetions between said v-hai'ts, a seeond sleeve pivoted about an :lv'is in the work head, a seeond transmilling shaft rotatable in said serond sleeve, toll-swiping universal driving eonnertions between said shaft, drivin; eonnertions from said seeond n'orh driving member, and means to eontinuoiwly maintain said shafts in uperative relation.

12. In a grinding maehine, a base, a table aiidable thereon, a \vork lunul adjustable on said table, a work-driving member mounted in said head, a horizontal intermediate shaft, mounted transversely in Silitl head above the axi of said member, a transmitting shaft; mounted in a bearing movable about the all 1,271,:qo0

axis of said intermediate shafp, gearing conmitting shafts, and means to maintain said necking said shaft, and spindle a horizontal transmitting shafts in operative relation in 10 driving shaft mounted in said lmse, a transevery position of the work hand.

mitting shaft mounted in bearings movable In testimony whereof we have hereunto about the axis of said drive shaft, gearing affixed our signatures.

connecting said drive shaft and the latter transmitting shaft, a telescoping universal CHARLES H. NORTON. driving connection between said two trans JOSEPH S. WILCOX, JR. 

